Metal cartridge for shotguns



1940? .J. SPENGLER 8 98 METAL CARTRIDGE FOR SHOTGUNS Filed NOV. 18, 1938i i 1 fi 2 Patented Feb. 6, 1940 UNITED sm'rss PA E T orri cs JulesSpengler; Mulhouse-Bourtzwiller (Bant- Bhin), France ApplicationNovember 18, 1938, Serial No. 241.284

' In France April 15, 1938 4 Claims. (Cl. 102-15) Myinvention relatestocartridges for shotguns The outer edge 8 of the ring is preferably andchiefly to cartridges made of light metal, raised after the manner of adish and may hear more particularly of the type disclosed in my co-'outwardly against the sloping surface of the pending application SerialNumber 152,780, filed groove,

July 9, 1937, now Patent Number 2,144,232 of The ring is set in placevery easily by forcing January 17, 1939, the ring, the outer diameter ofwhich is larger It has been proposed already to use for closing than theinner diameter of the casing, into said such cartridges a retaining partconstituted by casing. When the ring has reached the level oi a yieldingmetal disk engaging one or more the groove 1, it expands and its edgeengages 10 grooves provided inside the metal casing. But the groove 2.10 such disks show the drawback of screening the Furthermore aftercharging, the upper end of charge. the cartridge is submitted to aslight restriction My invention has for its object to remove this asshown at 9. drawback by using for closing the cartridge. a What I claimis: retaining ring of yielding metal the outer di- 1. A cartridge forshotguns, comprising a cy- 15 meter of which is larger than the innerdiamelindrical metal casing provided with at least one ter of thecasing, said ring retaining through its internal annular groove near itsouter end, a reperiphery a disk of known type made of amatesilient metalring, the external diameter of said rial which becomes disintegratedwhen the shot ring being greater than the internal diameter of is fired.Agglomerated cork has been found to said casing and fitting resilientlyin said annular 20 -be of particular interest to this effect. groove,and a closing disc of a material adapted Preferably the outer edge ofthe ring is raised to be disintegrated at the firing, said closing discto allow its easy introduction inside the casing being retained by saidmetal ring and retaining and eventually to provide a bearing for itagainst a shot and powder charge withinsaid casing. 5 a slope providedto this end inside the groove. 2. A cartridge for shotguns, comprising acy- Moreover it has been found that it is of advanlindrical metal casingprovided with at least one tage to slightly restrict after charging, theupper internal annular groove near its outer end, a opening of thecartridge. This restricted openresilient metal ring having afrustoconical secing has in particular two advantages: firstly the tion,the external diameter of said ring being .30 diameter of the upper partof the cartridge is greater than the internal diameter of saidcasslightly reduced by means of a smooth outline, ing and fittingresiliently in said annular groove, which renders its introduction intothe chamber and a closing disc of a material adipted to be or the guneasier; secondly there is a ballistic disintegrated at the firing, saidclosing disc beadvantage inasmuch as this restriction gives a ingretained by said metal ring and retaining a greater speed to the charge.shot and powder charge within said casing. 35 v I have describedhereinbelow by way of exam- 3. A cartridge for shotguns, comprising acypie and shown in the accompanying drawing a lindrical metal casing theouter end of which has form of execution at my invention. a portiongradually and slightly reduced in di- Fig. 1 is an axial "cross-sectionof the whole ameterysaid casing being provided near said 40 cartridge.outer end with at least one internal annular 40 Fig. 2 is a detailpartly sectional view at a groove, a resilient metal ring, the externaldilarger scale. ameter of said ring being greater than the in- The metalcasing l of aluminium or duralumin, ternal diameter of said casing andfitting 1e contains as usual the charge of powder 2, the siliently insaid annular groove, and a closing 5 wad 3, the shot 8. This shot isheld down by disc of a material adapted to be disintegrated at M thedisk 5 which is preferably of agglomerated the firing, said closing discbeing retained by cork so that it may be easily disintegrated when saidmetal ring and retaining a shot and powder the shot is fired. The diskis retained by a ring charge within said casing. 6 of yielding metal,such as brass, which projects 4. A cartridge according to claim 1,wherein an inwi cily just enough to retain the disES. The inwardlyturned flange is provided at the outer w disk 5 engages a groove 1provided in the wall 01' end of said casing.

the casing and which has preferably a sloping 1 ms SPENGIER. surface 1

